积分凸性及其应用  

The Integral Convexity and Their Applications

作　　者：王见勇[1] 马玉梅[2] 

机构地区：[1]常熟理工学院数学系,常熟215500 [2]大连民族学院计算机系,大连116600

出　　处：《数学物理学报（A辑）》2006年第1期77-86,共10页Acta Mathematica Scientia

基　　金：江苏省教育厅自然科学基金资助

摘　　要：该文在Banach空间中通过向量值函数的Bochner积分引进集合与泛函的积分凸性以及集合的积分端点等概念．文章主要证明有限维凸集、开凸集和闭凸集均是积分凸集,下半连续凸泛函与开凸集上的上半连续凸泛函均是积分凸的,非空紧集具有积分端点,对紧凸集来说其积分端点集与端点集一致,最后给出积分凸性在最优化理论方面的两个应用．In this paper, via Bochner integral of vector-valued functions, the authors introduce the concepts of integral convex sets and integral convex functionals and integral extremal points of sets in Banach spaces. The authors mainly show that every finite dimensional convex set and every open or closed convex set are integral convex; every lower semi-continuous convex functional and every upper semi-continuous convex flmctional defined on a open convex set are integral convex; every nonempty compact sets have integral extremal points; the integral extremal points set is equal to the extremal points set for every compact convex set. Two applications of integral convexity are obtained at last.

关 键 词：BOCHNER积分 积分凸集 积分凸泛函 积分端点 积分凸规划 

分 类 号：O177[理学—数学]